Banishment requires a specific component

An item distasteful to the target

So does Summon Greater Demon

Vial of blood from humanoid killed in past 24hrs

I thought I had seen this question here before, but I couldn't find it to double-check, so I'm asking again.

Are these components with unique conditions assumed to have a cost? Or can they be replaced by a component pouch or arcane focus?

My interpretation is that cost isn't just gold, it is any sort of condition on the item (so, distasteful items or blood with timer requirements have a cost). Therefore, both these spells would require specific components to be cast. Is my interpretation correct?